My friend just got himself a brand new PSP 3000, 6.60 pro b10 firmware... the problem is it crashes when trying to play KH:BBS Final Mix and Persona 2...would anyone happen to know if the firmware's the problem?

Dependent upon how he "Acquired" those games. If he store bought them, then I can only suggest switching to OFW to test it out. If that doesn't work it's the games themselves. If he.... "Acquired" them then he should buy physical copies. Now if he bought them and then put them on his MS (like a smart person) then he needs to re-create files for those games because they're possibly corrupt.